Back-geared motor.



No. 787,482. PATENTED APR. 18, 1905. L. A. TIRRILL.

BACK GEARED MOTOR! APPLICATION FILED AUG.15, 1904.

Witnesses: Inventor: 27 Leonard fLTirrill,

%W v y UNITED Sierras Eatented April 3.8, 1905.

LEONARD A. 'llltltliL, OF LYNN, LiiASSACHUSETTS, ASSIGNOR TO GENRE-f L ELEUFRIU (JOB WAN 1', A UQRPORJUQION OF NEW YORK.

EAGKGEARE MQTQFSU SPEGIFIGATION forming of Letters Patent No. 737,482, dated April 18, 1995.

Application filed August 5,1905 Serial No. 219,538.

Be it known that l, LEONARD A. 'inunnn, citizen of the United States, residing at Lynn, in th. county of Essex and State of .l/iassachusetts, have invented certain new and useful improvements in Back Geared h iotors, of which the following is a specification.

My present invention relates to means for mounting a back gear or counter-shaft on the frame of an electric motor.

The various features of novelty which characterize my invention are pointed out with. perticularity in the claims annexed to and forming a part of this specification. For a hette'r understanding of my invention, howeve reference may be had to the accompanying,

ings and description, in which it have illus? trated and described one embodiment of my invention.

Of the drawings, Figure 1 is an end elevation of an electric motor equipped with my invention, thebuck gear itself being removed.

2 is an elevation of the adjustable memher to which the backgear-supporting shaft is secured. 3 is n partial section on the lines 3301" Fig.1. 1 with'the hack gear in place, and Fig. is a plan viewo'f the motor shown in Fig". 4;.

Referring to the drawings, 1 represents tue main frame or lield-ring of an electric motor. The main frame 1 is provided with integrztliyformed supporting-feet frame 1 are secured end plates or members 3 and 4:. The armatureshaft 5 of the motor is journaled in bossesor boxes 6 and 7, carried by the end plates 3 and 4:, respectively.

One end plate has formed in it concentric with the armature-shaft an annular groove or channel 8. Theg'roove or channel is undercut to T-shaped 1n CXOSSSOCBIOP. having an inner portion 9 and an outer smaller portion 10,

Fig. t is a view similar to" To the ends of the slides in the portion 9 of the groove 8, and a 5 portion 16, which slides in the portion 10 of the channel 8. The nuts I L may be inserted in the annular channel 8 through openings 1?, formed in the bottom wall of the recess.

A part 18, ezrtcndin; integrally from. the member 11, is slotted at 19 to receive one end of the shaft 20. The shaft 520 is "formed with a collar 21, which bears against the fr-outside ofthe part 18. The inner end of the shaftTZO is threaded, and a nut 22 servesas menus for clamping the shaft 20 to the pert 18. A genrwheel E53, pivotally mounted on the shaft 20; meshes with gear 24;, carried at the end of the armature-shift Usually the gear 2-1 is smaller than the A driving member, 5 which may he in the form of sprocket-wl'ieel 25, is secured in any suitable. manner to the gear-wheel 23. A nut 26 serves to hold the gear-Wheel 23 in place on the shaft 20, The sprocket wheel '25 drive a sprocket 7 chain 917.

By adjusting the shsft 20 toward and away from the armatureshaft 5 in the slot 19 in the 18 th gears 23 and 2e may be accurately titted together. This also aliows of the use of differentsize genes/heels The construction shown allows the shaft 20 and parts carried by to be angularly adjusted about the armstureshaft 5 to accommodate different positions of the motor and work driven by it. Suitable means which It have not thought it necessary to illustrate may be employed to lubricate the shaft 20.

What ll claim as new, and desire to secure by Letters Patent of the United States, is

l. in an-electric motor, an end plate or member formed with an undercut channel in. it, an armature-shaft journaled in said plnte, a counter-shaft, a supporting member therefor, said supporting member being adjustably 9 secured in said channel, agear-wheel mounted on the armature-shaft, and a gear carried by the adjustable shaft meshing with the lirstmentioned gear-wheel.

in an electric motor, an end plate or member having an annular undercut channel formed in it, an urmatureshaft journaled in said end plate and carrying a gear-wheel, a 

